./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:15:51,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:15:51,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:15:51,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:15:51,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:15:51,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:15:51,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:15:51,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:15:51,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:15:51,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:15:51,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:15:51,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:15:51,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:15:51,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:15:51,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:15:51,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:15:51,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:15:51,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:15:51,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:15:51,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:15:51,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:15:51,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:15:51,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:15:51,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:15:51,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:15:51,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:15:51,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:15:51,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:15:51,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:15:51,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:15:51,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:15:51,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:15:51,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:15:51,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:15:51,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:15:51,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:15:51,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:15:51,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:15:51,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:15:51,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:15:51,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:15:51,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:15:51,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:15:51,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:15:51,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:15:51,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:15:51,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:15:51,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:15:51,744 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:15:51,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:15:51,745 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:15:51,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:15:51,745 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:15:51,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:15:51,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:15:51,747 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:15:51,747 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:15:51,747 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:15:51,748 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:15:51,748 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:15:51,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:15:51,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:15:51,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:15:51,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:15:51,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:15:51,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:15:51,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:15:51,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:15:51,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:15:51,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:15:51,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:15:51,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:15:51,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:15:51,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:15:51,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:15:51,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:15:51,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:15:51,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:15:51,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:15:51,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:15:51,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:15:51,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:15:51,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:15:51,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb [2022-10-17 17:15:52,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:15:52,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:15:52,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:15:52,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:15:52,085 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:15:52,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/systemc/kundu.cil.c [2022-10-17 17:15:52,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/data/4af1f4d25/009c3e5e391c4a2e8ee94a133f5fe979/FLAG7e529bcfb [2022-10-17 17:15:52,643 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:15:52,643 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/sv-benchmarks/c/systemc/kundu.cil.c [2022-10-17 17:15:52,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/data/4af1f4d25/009c3e5e391c4a2e8ee94a133f5fe979/FLAG7e529bcfb [2022-10-17 17:15:52,990 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/data/4af1f4d25/009c3e5e391c4a2e8ee94a133f5fe979 [2022-10-17 17:15:52,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:15:53,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:15:53,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:15:53,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:15:53,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:15:53,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:15:52" (1/1) ... [2022-10-17 17:15:53,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f8f45a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53, skipping insertion in model container [2022-10-17 17:15:53,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:15:52" (1/1) ... [2022-10-17 17:15:53,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:15:53,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:15:53,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2022-10-17 17:15:53,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:15:53,423 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:15:53,447 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2022-10-17 17:15:53,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:15:53,530 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:15:53,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53 WrapperNode [2022-10-17 17:15:53,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:15:53,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:15:53,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:15:53,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:15:53,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,604 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 315 [2022-10-17 17:15:53,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:15:53,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:15:53,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:15:53,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:15:53,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,635 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:15:53,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:15:53,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:15:53,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:15:53,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (1/1) ... [2022-10-17 17:15:53,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:15:53,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:15:53,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:15:53,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5eb0875-30f3-4f42-af5a-339b465284de/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:15:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:15:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-10-17 17:15:53,728 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-10-17 17:15:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-10-17 17:15:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-10-17 17:15:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:15:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:15:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:15:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:15:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:15:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:15:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:15:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:15:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:15:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:15:53,731 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:15:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:15:53,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:15:53,811 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:15:53,814 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:15:54,218 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:15:54,438 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:15:54,438 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 17:15:54,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:54 BoogieIcfgContainer [2022-10-17 17:15:54,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:15:54,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:15:54,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:15:54,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:15:54,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:15:52" (1/3) ... [2022-10-17 17:15:54,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5907828d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:15:54, skipping insertion in model container [2022-10-17 17:15:54,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:53" (2/3) ... [2022-10-17 17:15:54,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5907828d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:15:54, skipping insertion in model container [2022-10-17 17:15:54,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:54" (3/3) ... [2022-10-17 17:15:54,452 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2022-10-17 17:15:54,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:15:54,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:15:54,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:15:54,546 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@680d5b0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:15:54,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:15:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-10-17 17:15:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 17:15:54,562 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:54,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:54,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:54,570 INFO L85 PathProgramCache]: Analyzing trace with hash 515396759, now seen corresponding path program 1 times [2022-10-17 17:15:54,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:54,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360067454] [2022-10-17 17:15:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:54,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:54,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:54,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360067454] [2022-10-17 17:15:54,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360067454] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:54,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:54,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:15:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153239437] [2022-10-17 17:15:54,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:54,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:15:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:15:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:54,996 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:15:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:55,499 INFO L93 Difference]: Finished difference Result 263 states and 391 transitions. [2022-10-17 17:15:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:15:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-10-17 17:15:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:55,518 INFO L225 Difference]: With dead ends: 263 [2022-10-17 17:15:55,518 INFO L226 Difference]: Without dead ends: 171 [2022-10-17 17:15:55,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:15:55,527 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 225 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:55,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 348 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:15:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-10-17 17:15:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-10-17 17:15:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 127 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 17:15:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 231 transitions. [2022-10-17 17:15:55,638 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 231 transitions. Word has length 39 [2022-10-17 17:15:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:55,639 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 231 transitions. [2022-10-17 17:15:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:15:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 231 transitions. [2022-10-17 17:15:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 17:15:55,643 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:55,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:55,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:15:55,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash -456277928, now seen corresponding path program 1 times [2022-10-17 17:15:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941173125] [2022-10-17 17:15:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:55,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:55,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941173125] [2022-10-17 17:15:55,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941173125] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:55,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:55,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:15:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766048035] [2022-10-17 17:15:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:55,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:15:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:15:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:55,863 INFO L87 Difference]: Start difference. First operand 165 states and 231 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:15:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:56,416 INFO L93 Difference]: Finished difference Result 693 states and 969 transitions. [2022-10-17 17:15:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:15:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-10-17 17:15:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:56,430 INFO L225 Difference]: With dead ends: 693 [2022-10-17 17:15:56,430 INFO L226 Difference]: Without dead ends: 508 [2022-10-17 17:15:56,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:15:56,444 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 474 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:56,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 533 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:15:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-10-17 17:15:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 389. [2022-10-17 17:15:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 298 states have (on average 1.4261744966442953) internal successors, (425), 303 states have internal predecessors, (425), 60 states have call successors, (60), 30 states have call predecessors, (60), 30 states have return successors, (60), 56 states have call predecessors, (60), 57 states have call successors, (60) [2022-10-17 17:15:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 545 transitions. [2022-10-17 17:15:56,554 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 545 transitions. Word has length 39 [2022-10-17 17:15:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:56,562 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 545 transitions. [2022-10-17 17:15:56,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:15:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 545 transitions. [2022-10-17 17:15:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 17:15:56,568 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:56,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:56,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:15:56,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2056247895, now seen corresponding path program 1 times [2022-10-17 17:15:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187130005] [2022-10-17 17:15:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:56,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187130005] [2022-10-17 17:15:56,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187130005] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:56,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:56,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:15:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113856331] [2022-10-17 17:15:56,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:56,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:15:56,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:15:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:15:56,792 INFO L87 Difference]: Start difference. First operand 389 states and 545 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 17:15:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:56,981 INFO L93 Difference]: Finished difference Result 1011 states and 1419 transitions. [2022-10-17 17:15:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:15:56,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2022-10-17 17:15:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:56,991 INFO L225 Difference]: With dead ends: 1011 [2022-10-17 17:15:56,992 INFO L226 Difference]: Without dead ends: 628 [2022-10-17 17:15:56,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:15:57,004 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:57,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 445 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:15:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-10-17 17:15:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 607. [2022-10-17 17:15:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 463 states have (on average 1.4168466522678185) internal successors, (656), 476 states have internal predecessors, (656), 93 states have call successors, (93), 50 states have call predecessors, (93), 50 states have return successors, (93), 81 states have call predecessors, (93), 90 states have call successors, (93) [2022-10-17 17:15:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 842 transitions. [2022-10-17 17:15:57,125 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 842 transitions. Word has length 40 [2022-10-17 17:15:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:57,126 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 842 transitions. [2022-10-17 17:15:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 17:15:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 842 transitions. [2022-10-17 17:15:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 17:15:57,136 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:57,137 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:15:57,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -422160077, now seen corresponding path program 1 times [2022-10-17 17:15:57,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:57,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137855128] [2022-10-17 17:15:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:57,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137855128] [2022-10-17 17:15:57,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137855128] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:57,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:57,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:15:57,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515366589] [2022-10-17 17:15:57,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:15:57,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:15:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:15:57,451 INFO L87 Difference]: Start difference. First operand 607 states and 842 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:15:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:57,810 INFO L93 Difference]: Finished difference Result 1710 states and 2394 transitions. [2022-10-17 17:15:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:15:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2022-10-17 17:15:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:57,822 INFO L225 Difference]: With dead ends: 1710 [2022-10-17 17:15:57,822 INFO L226 Difference]: Without dead ends: 1171 [2022-10-17 17:15:57,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:15:57,832 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 197 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 778 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:15:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-10-17 17:15:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1135. [2022-10-17 17:15:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 872 states have (on average 1.4094036697247707) internal successors, (1229), 895 states have internal predecessors, (1229), 168 states have call successors, (168), 93 states have call predecessors, (168), 94 states have return successors, (170), 147 states have call predecessors, (170), 165 states have call successors, (170) [2022-10-17 17:15:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1567 transitions. [2022-10-17 17:15:58,013 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1567 transitions. Word has length 50 [2022-10-17 17:15:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:58,015 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1567 transitions. [2022-10-17 17:15:58,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:15:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1567 transitions. [2022-10-17 17:15:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 17:15:58,020 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:58,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:58,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:15:58,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:58,023 INFO L85 PathProgramCache]: Analyzing trace with hash 705776509, now seen corresponding path program 1 times [2022-10-17 17:15:58,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:58,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982982360] [2022-10-17 17:15:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:58,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:58,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982982360] [2022-10-17 17:15:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982982360] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:58,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:58,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:15:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413266378] [2022-10-17 17:15:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:58,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:15:58,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:15:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:15:58,243 INFO L87 Difference]: Start difference. First operand 1135 states and 1567 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:15:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:58,680 INFO L93 Difference]: Finished difference Result 3491 states and 4846 transitions. [2022-10-17 17:15:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:15:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-10-17 17:15:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:58,703 INFO L225 Difference]: With dead ends: 3491 [2022-10-17 17:15:58,703 INFO L226 Difference]: Without dead ends: 2362 [2022-10-17 17:15:58,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:15:58,708 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 333 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:58,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 264 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:15:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-10-17 17:15:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2065. [2022-10-17 17:15:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1597 states have (on average 1.3994990607388853) internal successors, (2235), 1621 states have internal predecessors, (2235), 291 states have call successors, (291), 173 states have call predecessors, (291), 176 states have return successors, (297), 271 states have call predecessors, (297), 288 states have call successors, (297) [2022-10-17 17:15:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2823 transitions. [2022-10-17 17:15:58,962 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2823 transitions. Word has length 53 [2022-10-17 17:15:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:58,963 INFO L495 AbstractCegarLoop]: Abstraction has 2065 states and 2823 transitions. [2022-10-17 17:15:58,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:15:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2823 transitions. [2022-10-17 17:15:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 17:15:58,966 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:58,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:15:58,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2102794554, now seen corresponding path program 1 times [2022-10-17 17:15:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149674658] [2022-10-17 17:15:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:59,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:59,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149674658] [2022-10-17 17:15:59,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149674658] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:59,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:59,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:15:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145594574] [2022-10-17 17:15:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:59,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:15:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:15:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:15:59,049 INFO L87 Difference]: Start difference. First operand 2065 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:15:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:59,403 INFO L93 Difference]: Finished difference Result 4741 states and 6485 transitions. [2022-10-17 17:15:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:15:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 54 [2022-10-17 17:15:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:59,425 INFO L225 Difference]: With dead ends: 4741 [2022-10-17 17:15:59,425 INFO L226 Difference]: Without dead ends: 2681 [2022-10-17 17:15:59,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:15:59,434 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 93 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:59,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 212 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:15:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2022-10-17 17:15:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2242. [2022-10-17 17:15:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1689 states have (on average 1.3457667258732977) internal successors, (2273), 1717 states have internal predecessors, (2273), 346 states have call successors, (346), 207 states have call predecessors, (346), 206 states have return successors, (343), 318 states have call predecessors, (343), 343 states have call successors, (343) [2022-10-17 17:15:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 2962 transitions. [2022-10-17 17:15:59,725 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 2962 transitions. Word has length 54 [2022-10-17 17:15:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:59,726 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 2962 transitions. [2022-10-17 17:15:59,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:15:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 2962 transitions. [2022-10-17 17:15:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 17:15:59,728 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:59,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:15:59,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:15:59,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 493560610, now seen corresponding path program 1 times [2022-10-17 17:15:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:59,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964885717] [2022-10-17 17:15:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:59,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:59,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964885717] [2022-10-17 17:15:59,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964885717] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:59,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:59,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:15:59,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062130210] [2022-10-17 17:15:59,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:59,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:15:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:15:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:15:59,878 INFO L87 Difference]: Start difference. First operand 2242 states and 2962 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:16:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:16:00,598 INFO L93 Difference]: Finished difference Result 6180 states and 8394 transitions. [2022-10-17 17:16:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:16:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-10-17 17:16:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:16:00,633 INFO L225 Difference]: With dead ends: 6180 [2022-10-17 17:16:00,633 INFO L226 Difference]: Without dead ends: 4169 [2022-10-17 17:16:00,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:16:00,641 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 404 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:16:00,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 623 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:16:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2022-10-17 17:16:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3198. [2022-10-17 17:16:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2417 states have (on average 1.3475382705833678) internal successors, (3257), 2447 states have internal predecessors, (3257), 488 states have call successors, (488), 293 states have call predecessors, (488), 292 states have return successors, (485), 458 states have call predecessors, (485), 485 states have call successors, (485) [2022-10-17 17:16:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4230 transitions. [2022-10-17 17:16:01,050 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4230 transitions. Word has length 55 [2022-10-17 17:16:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:16:01,051 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 4230 transitions. [2022-10-17 17:16:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:16:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4230 transitions. [2022-10-17 17:16:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-17 17:16:01,054 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:16:01,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:16:01,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:16:01,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:16:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:16:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash 432913418, now seen corresponding path program 1 times [2022-10-17 17:16:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:16:01,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164262942] [2022-10-17 17:16:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:16:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:16:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:16:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:16:01,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:16:01,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164262942] [2022-10-17 17:16:01,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164262942] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:16:01,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:16:01,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:16:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122673605] [2022-10-17 17:16:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:16:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:16:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:16:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:16:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:16:01,247 INFO L87 Difference]: Start difference. First operand 3198 states and 4230 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:16:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:16:02,156 INFO L93 Difference]: Finished difference Result 9896 states and 13111 transitions. [2022-10-17 17:16:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:16:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2022-10-17 17:16:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:16:02,209 INFO L225 Difference]: With dead ends: 9896 [2022-10-17 17:16:02,209 INFO L226 Difference]: Without dead ends: 6704 [2022-10-17 17:16:02,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:16:02,221 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 360 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:16:02,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 279 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:16:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2022-10-17 17:16:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 6126. [2022-10-17 17:16:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 4617 states have (on average 1.327485380116959) internal successors, (6129), 4655 states have internal predecessors, (6129), 936 states have call successors, (936), 573 states have call predecessors, (936), 572 states have return successors, (933), 898 states have call predecessors, (933), 933 states have call successors, (933) [2022-10-17 17:16:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 7998 transitions. [2022-10-17 17:16:03,075 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 7998 transitions. Word has length 57 [2022-10-17 17:16:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:16:03,076 INFO L495 AbstractCegarLoop]: Abstraction has 6126 states and 7998 transitions. [2022-10-17 17:16:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:16:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 7998 transitions. [2022-10-17 17:16:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 17:16:03,079 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:16:03,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:16:03,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:16:03,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:16:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:16:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2052776908, now seen corresponding path program 1 times [2022-10-17 17:16:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:16:03,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442554333] [2022-10-17 17:16:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:16:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:16:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:16:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:16:03,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:16:03,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442554333] [2022-10-17 17:16:03,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442554333] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:16:03,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:16:03,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:16:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530687567] [2022-10-17 17:16:03,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:16:03,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:16:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:16:03,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:16:03,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:16:03,160 INFO L87 Difference]: Start difference. First operand 6126 states and 7998 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:16:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:16:05,060 INFO L93 Difference]: Finished difference Result 20396 states and 27116 transitions. [2022-10-17 17:16:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:16:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2022-10-17 17:16:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:16:05,161 INFO L225 Difference]: With dead ends: 20396 [2022-10-17 17:16:05,162 INFO L226 Difference]: Without dead ends: 14276 [2022-10-17 17:16:05,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:16:05,188 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 471 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:16:05,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 493 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:16:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2022-10-17 17:16:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 10725. [2022-10-17 17:16:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 8171 states have (on average 1.3402276343164852) internal successors, (10951), 8265 states have internal predecessors, (10951), 1543 states have call successors, (1543), 1011 states have call predecessors, (1543), 1010 states have return successors, (1632), 1449 states have call predecessors, (1632), 1540 states have call successors, (1632) [2022-10-17 17:16:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 14126 transitions. [2022-10-17 17:16:06,645 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 14126 transitions. Word has length 59 [2022-10-17 17:16:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:16:06,646 INFO L495 AbstractCegarLoop]: Abstraction has 10725 states and 14126 transitions. [2022-10-17 17:16:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:16:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 14126 transitions. [2022-10-17 17:16:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-17 17:16:06,652 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:16:06,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:16:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:16:06,654 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:16:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:16:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1805023809, now seen corresponding path program 1 times [2022-10-17 17:16:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:16:06,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106208317] [2022-10-17 17:16:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:16:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:16:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:16:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:16:06,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:16:06,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106208317] [2022-10-17 17:16:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106208317] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:16:06,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:16:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:16:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125161350] [2022-10-17 17:16:06,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:16:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:16:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:16:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:16:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:16:06,751 INFO L87 Difference]: Start difference. First operand 10725 states and 14126 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:16:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:16:08,725 INFO L93 Difference]: Finished difference Result 25885 states and 34123 transitions. [2022-10-17 17:16:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:16:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-10-17 17:16:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:16:08,803 INFO L225 Difference]: With dead ends: 25885 [2022-10-17 17:16:08,804 INFO L226 Difference]: Without dead ends: 15708 [2022-10-17 17:16:08,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:16:08,841 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 284 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:16:08,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 576 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:16:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15708 states. [2022-10-17 17:16:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15708 to 15433. [2022-10-17 17:16:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15433 states, 11779 states have (on average 1.3395874013074114) internal successors, (15779), 11883 states have internal predecessors, (15779), 2209 states have call successors, (2209), 1445 states have call predecessors, (2209), 1444 states have return successors, (2334), 2105 states have call predecessors, (2334), 2206 states have call successors, (2334) [2022-10-17 17:16:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15433 states to 15433 states and 20322 transitions. [2022-10-17 17:16:10,823 INFO L78 Accepts]: Start accepts. Automaton has 15433 states and 20322 transitions. Word has length 63 [2022-10-17 17:16:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:16:10,824 INFO L495 AbstractCegarLoop]: Abstraction has 15433 states and 20322 transitions. [2022-10-17 17:16:10,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:16:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 15433 states and 20322 transitions. [2022-10-17 17:16:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 17:16:10,829 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:16:10,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:16:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:16:10,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:16:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:16:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash -505922541, now seen corresponding path program 1 times [2022-10-17 17:16:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:16:10,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79406703] [2022-10-17 17:16:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:16:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:16:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:16:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:16:11,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:16:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79406703] [2022-10-17 17:16:11,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79406703] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:16:11,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:16:11,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:16:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589662423] [2022-10-17 17:16:11,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:16:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:16:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:16:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:16:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:16:11,012 INFO L87 Difference]: Start difference. First operand 15433 states and 20322 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:16:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:16:14,747 INFO L93 Difference]: Finished difference Result 48675 states and 66346 transitions. [2022-10-17 17:16:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:16:14,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-10-17 17:16:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:16:14,930 INFO L225 Difference]: With dead ends: 48675 [2022-10-17 17:16:14,930 INFO L226 Difference]: Without dead ends: 33790 [2022-10-17 17:16:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:16:14,985 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 449 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:16:14,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1382 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:16:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33790 states. [2022-10-17 17:16:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33790 to 24281. [2022-10-17 17:16:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24281 states, 18575 states have (on average 1.3428263795423956) internal successors, (24943), 18697 states have internal predecessors, (24943), 3451 states have call successors, (3451), 2255 states have call predecessors, (3451), 2254 states have return successors, (3668), 3329 states have call predecessors, (3668), 3448 states have call successors, (3668) [2022-10-17 17:16:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24281 states to 24281 states and 32062 transitions. [2022-10-17 17:16:17,627 INFO L78 Accepts]: Start accepts. Automaton has 24281 states and 32062 transitions. Word has length 66 [2022-10-17 17:16:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:16:17,628 INFO L495 AbstractCegarLoop]: Abstraction has 24281 states and 32062 transitions. [2022-10-17 17:16:17,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:16:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 24281 states and 32062 transitions. [2022-10-17 17:16:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:16:17,634 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:16:17,634 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:16:17,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 17:16:17,635 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:16:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:16:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -349305876, now seen corresponding path program 1 times [2022-10-17 17:16:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:16:17,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734895112] [2022-10-17 17:16:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:16:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:16:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:16:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:16:17,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:16:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734895112] [2022-10-17 17:16:17,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734895112] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:16:17,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:16:17,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:16:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238301309] [2022-10-17 17:16:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:16:17,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:16:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:16:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:16:17,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:16:17,783 INFO L87 Difference]: Start difference. First operand 24281 states and 32062 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)